Circular loom



1954 c. CHRISTIANSEN ET AL 2,696,837

CIRCULAR LOOM Filed April 9, 1951 2,696,837 Patented Dec. 14, 1954 ffice CIRCULAR LOOM Christian Christiansen, Oslo, and Gustav Otto Karl Riisch, Manda], Norway Application April 9, 1951, Serial No. 220,072

Claims priority, application Norway July 11, 1950 1 Claim. (Cl. 139-13) This invention relates to circular looms for hoses in which the weaving takes place at the upper edge of a weaving ring (caliber) through which the woven hose is pulled down, the weft thread being pressed in between the warp threads (the shed) by means of a pressing member, the so-called sector rotating above the upper edge of the weaving ring.

In these looms the sectors or each sector will by its rotation act on the warp threads in the way that they are slightly displaced in the direction of rotation of the sector. This brings about that the warp threads in the woven hose will lay in long spirals, the pitch of which will depend upon the pressure of the sector and consequently upon the tightness of the weave. In very tight woven hoses the pitch of the spirals may be about 4 to 5 metres. This spiral-formed lay of the warp threads will be particularly visible if the hose, as is often required, is marked thereby that some of the warp threads has a colour differing from the colour of the other threads.

The present invention has for its object an arrangement bringing about that the warp threads will be positioned axially in the hose. According to the invention this is obtained thereby that the weaving ring during the weaving is given a rotation in the direction opposite to the direction of rotation of the sector. By the friction of the warp threads against the rotating weaving ring the said effect of the rotating sectors will be compensated.

The velocity of rotation (peripheral velocity) of the weaving ring is suitably made depending on the velocity of rotation of the sector and the force with which the sector presses the weft threads into the shed, so that the velocity of the weaving ring is increased with increasing velocity and pressure of the sector. The velocity of rotation of the weaving ring as a rule will be smaller than that of the sectors. The drive of the weaving ring is suitably arranged so that its velocity of rotation varies automatically with the variation of the velocity of rotation of the sectors.

The drawing illustrates diagrammatically an embodiment of an arrangement according to the invention, partly in vertical section.

In the drawing 1 is the weaving ring or caliber at the upper edge of which the weaving is effected, and 2 the Woven hose which by the weaving is gradually pulled down through the weaving ring and the pipe 3. 12 is the weft thread bobbin, 13 the sector carrier and 11 the sector pressing the weft thread in between the warp threads.

The warp threads which are indicated by 4 and 4 are passed from the bobbins 5, 5' through the guides 6 over the guide rods 7, 8 and from there through known heddles 9, 9' to the weaving ring 1. 10 is a tensioning weight which is suspended in a bight of the warp thread between the guide rods 7 and 8.

According to the invention, the weaving ring I is rotatable. In the embodiment shown it is mounted in a fixed plate 16 and is provided with a toothed rim 14 mesh ing with a pinion 15. The pinion may be driven by any suitable means. Preferably its rotation is derived from the driving gear of the sectors.

We claim:

In a circular loom for weaving of hoses, a weaving ring over the upper edge of which the warp threads are passed, at least one shuttle for weft thread rotating about the said weaving ring, a pressing member for each weft thread rotating above the upper edge of the said weaving ring and pressing the weft thread in between the warp threads, and means for imparting a rotary movement to the said weaving ring in a direction opposite to that of the said pressing member.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 2,252,470 Pelce Aug. 12, 1941 2,450,183 Christiansen et a1 Sept. 28, 1948 

